Journal ArticleDOI
Raman investigation of chalcopyrite oxidation
TLDR
Raman spectroscopic investigations have been carried out on the oxidation, utilising ferric ion or potential control, of chalcopyrite in chloride and sulfate media as mentioned in this paper.About:
This article is published in Colloids and Surfaces A: Physicochemical and Engineering Aspects.The article was published on 2008-04-01. It has received 86 citations till now. The article focuses on the topics: Sulfide & Raman spectroscopy.read more
Citations
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Journal ArticleDOI
A review of the structure, and fundamental mechanisms and kinetics of the leaching of chalcopyrite.
TL;DR: There is general agreement in the literature that chalcopyrite leaching is significantly affected by solution redox potential with an optimum E(h) range suggesting the participation of leach steps that involve both oxidation and reduction.
Journal ArticleDOI
Presentation on mechanisms and applications of chalcopyrite and pyrite bioleaching in biohydrometallurgy – a presentation
Huang Tao,Li Dongwei +1 more
TL;DR: The differences of mechanisms of the bioleaching and biooxidation on metal sulfides can be more clearly and explicitly understood by summarizing and comparing the two classic minerals, chalcopyrite and pyrite.
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A review of chloride assisted copper sulfide leaching by oxygenated sulfuric acid and mechanistic considerations
TL;DR: In this article, the first stage leaching of chalcocite to an intermediate CuS appears to be controlled by the mass transport of oxygen to the sulfide surface.
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Chemical-Electrochemical Approaches to the Study Passivation of Chalcopyrite
TL;DR: In this article, an ordered classification of the available information regarding the unresolved and often-ignored issues addressed by electrochemistry and surface analysis techniques is presented, including the most important issues.
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Disulphide and metal sulphide formation on the reconstructed (0 0 1) surface of chalcopyrite: A DFT study
TL;DR: In this article, the bulk and (0.0.1) surface of chalcopyrite have been investigated using Plane Waves Density Functional calculations and the band structure and the optimized lattice parameters are in good agreement with previously published results.
References
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Journal ArticleDOI
Etude par spectroscopie de photoelectrons de la degradation superficielle de FeS2, CuFeS2, ZnS et PbS a l'air et dans l'eau
TL;DR: In this paper, photoelectron spectroscopy (XPS) was used to characterize the surface of pyrite and chalcopyrite after exposure to air and distilled water.
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Passivation of chalcopyrite during oxidative leaching in sulfate media
TL;DR: In this paper, the oxygen pressure leaching behavior of chalcopyrite in the temperature range 110-220°C was studied to shed new light on the reasons for the slow leaching.
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XPS of sulphide mineral surfaces: metal‐deficient, polysulphides, defects and elemental sulphur
TL;DR: In this article, evidence from other techniques confirming assignment of high-binding-energy S 2p components to metal-deficient sulphide surfaces, polysulphides, elemental sulphur and electronic defect structures is considered for specific cases.
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A critical review of the surface chemistry of acidic ferric sulphate dissolution of chalcopyrite with regards to hindered dissolution
TL;DR: In this paper, a conceptual 4-stage model is proposed which explains all the general dissolution behaviour that is widely observed, i.e. of an induction period and a parabolic rate curve that may or may not be followed by linear rate behaviour.